Data stream management device



FIG. 1 is a rear elevational view of the data stream management device showing the new design;

FIG. 2 is a left side elevational view thereof, wherein the right side elevational view is a mirror image thereof;

FIG. 3 is a top view thereof, wherein the bottom view is a mirror image thereof; and,

FIG. 4 is a front elevational view thereof.

The broken lines are for illustrative purposes only, and form no part of the claimed design. 

The ornamental design for a data stream management device, as shown and described. 